Condoms for reducing failure rate and extending pleasure

ABSTRACT

A condom with reduced chance of failure includes an inner pouch within an outer pouch. The inner pouch is bonded to the outer pouch adjacent to their open ends to form a sealed interstitial space between the inner and outer pouches. A lubricant is located in the interstitial space to enable the outer pouch to slide relative to the inner pouch during sexual intercourse. The outer pouch has an enlarged head area so that the outer pouch easily slides back and forth over the inner pouch and glans of the penis during intercourse. The inner pouch has a wall thickness that is less than the wall thickness of the outer pouch for increased sensitivity. The inner pouch has a narrow segment extending into a smaller bulb exerting pressure at the junction of the glans and shaft covering the entire frenulum area, thereby inhibiting premature ejaculation and reducing slippage.

CROSS REFERENCES TO RELATED APPLICATIONS

This application claims the benefit of U.S. Provisional Application No.60/926,250, filed Apr. 25, 2007, and U.S. Provisional Application No.60/928,045, filed May 7, 2007, both to the same inventors as herein, theentire disclosures of which are incorporated herein by reference.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates generally to condoms for use during sexualintercourse.

2. Description of Related Art

With the proliferation of sexually transmitted diseases (STDs),including human immunodeficiency virus (HIV), the virus that causesacquired immune-deficiency syndrome (AIDS), and with the uncontrolledgrowth of the world's population, there is a pressing unmet need for aneffective means for preventing the transmission of STDs and forcontrolling population growth. One method for accomplishing both thesegoals is by introducing an effective barrier between male and female sexorgans during sexual intercourse for preventing the transmission ofbodily fluids and for limiting the actual skin-to-skin contact betweenthe sexual organs. Heretofore, conventional means for creating suchbarriers have included the use of condoms, diaphragms, prophylacticgels, creams, and the like.

Since ancient times, one successful means for creating a barrier tobodily fluids during sex has been the use of male condoms. Condoms forplacement over the penis were originally constructed from animal tissue,and condoms of this type are still in use today. Condoms of animaltissue are generally effective for preventing the passage of semen, butdo not prevent the passage of certain microbes, and in particularviruses, such as HIV. Accordingly, most male condoms are now constructedfrom latex, polyurethane, or other resilient modern polymers that areable to act as a barrier to microbes as well as bodily fluids. Whilecondoms have become popular for the control of STDs and pregnancyworldwide, there is still much room for improvement. For example, manymen do not like to use male condoms because such condoms can deadensensation, thereby causing erectile dysfunction and reduced pleasure.

Additionally, conventional condoms have unacceptable failure rates dueto a number of factors, such as breaking of the condom, pin holes in thecondom wall, slippage of the condom following ejaculation and otherfailures caused by poor design or improper usage. A recent study showedthat the failure rate of male condoms due to breakage was 15 percent.(See, R A Crosby et al., “Men with Broken Condoms: Who and Why?”,Sexually Transmitted Infections, 83(1), pp 71-75, February 2007.) Eventhough the failure rates are high, people continue to use condoms thatbreak frequently because they lack any better alternative for preventionof STDs and pregnancy. For example, female condoms, contraceptive gels,contraceptive creams, diaphragms and cervical caps all are lesseffective at preventing pregnancy and the transmission of STDs than malecondoms. Further, since the onset of the deadly AIDS epidemic, it hasbecome more important than ever to have a condom with reduced failurerates, and preferably a zero failure rate. Accordingly, there is anongoing need for a condom having a design that will induce a much lowerfailure rate.

Additionally, it is believed that every man has his own length of timenecessary for reaching ejaculation during sexual intercourse. Duringintercourse nerve impulses pass from the glans of the penis to the brainvia the spinal cord to signal ejaculation. The time to reach ejaculationmay vary from less than one minute to any number of minutes, dependingon the particular individual's signal mechanisms. Vasodilator drugs,such as Viagra®, while useful for helping a man achieve and maintain anerection, do not have any effect on prolonging the length of time forsexual intercourse. Application of local anesthetics, such as Lidocaine,sensation-reducing creams, and the like, may prolong the time ofintercourse, but at same time can severely reduce the pleasureexperienced by the male during the intercourse because they essentiallynumb the nerve endings. Accordingly, it would also be desirable if acondom were able to extend the time which it takes a man to reachejaculation during intercourse, while still providing pleasurablesensations to both partners.

Related art in the area of the invention includes U.S. Pat. Nos.5,191,902; 5,425,379; 5,623,945; 5,050,619; 5,045,341; 4,930,522;5,284,159; 5,102,405; 6,000,398; 5,082,004; 5,331,974; 5,622,186;5,513,652; 4,009,717; and European Patent Application No. EP0645128, theentire disclosures of which are incorporated herein by reference.

SUMMARY OF THE INVENTION

This invention relates to male barrier contraceptives having a reducedchance of breakage, slippage and pinholes. Embodiments of thecontraceptives of the invention are also able to increase the pleasurefor both partners, in addition to being able to prolong the length oftime for sexual intercourse. The invention provides male prophylacticdevices that are worn over the penis to prevent transmission of STDs,including AIDS, and to also prevent pregnancy. The present prophylacticdevices are designed to have a reduced failure rate, greater chance ofproper usage, and an increased acceptability for use by males. These andother features and advantages of the present invention will becomeapparent to those of ordinary skill in the art in view of the followingdetailed description of the preferred embodiments.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings, in conjunction with the general descriptiongiven above, and the detailed description of the preferred embodimentsgiven below, serve to illustrate and explain the principles of thepreferred embodiments of the best mode of the invention presentlycontemplated.

FIG. 1A illustrates an elevation view of an exemplary embodiment of adouble-walled condom according to the invention.

FIG. 1B illustrates an end view of the open end of the condom of FIG. 1Aas viewed from line 1B-1B.

FIG. 1C illustrates a cross section view taken along line 1C-1C of FIG.1A.

FIG. 1D illustrates a cross section view taken along line 1D-1D of FIG.1A.

FIG. 1E illustrates a cross section view taken along line 1E-1E of FIG.1A.

FIG. 2 illustrates an elevation view of the inner pouch of the condom ofFIG. 1A.

FIG. 3 illustrates an elevation view of the outer pouch of the condom ofFIG. 1A.

FIG. 4A illustrates a plan view of an exemplary embodiment of a guidethat may be used with the condom of the invention.

FIG. 4B illustrates an elevation view of the guide of FIG. 4A.

FIG. 5A illustrates a plan view of the guide of FIG. 4A with a condominstalled thereon.

FIG. 5B illustrates an elevation view of the guide of FIG. 4B with acondom installed thereon.

FIG. 6A illustrates another exemplary embodiment of a condom of theinvention.

FIG. 6B illustrates a top view of the condom of FIG. 6A, as taken alongline 6B-6B.

FIG. 7 illustrates another exemplary embodiment of a condom of theinvention.

FIG. 8 illustrates another exemplary embodiment of a condom of theinvention.

DETAILED DESCRIPTION OF THE INVENTION

In the following detailed description of the invention, reference ismade to the accompanying drawings which form a part of the disclosure,and, in which are shown by way of illustration, and not of limitation,specific embodiments by which the invention may be practiced. In thedrawings, like numerals describe substantially similar componentsthroughout the several views. Further, the drawings, the foregoingdiscussion, and following description are exemplary and explanatoryonly, and are not intended to limit the scope of the invention or thisapplication in any manner.

In some embodiments of the present invention, there are providedprophylactic devices which are adopted to be worn by a person to preventtransmission of STDs and semen, even during strenuous sexual intercoursewhich might cause breakage in conventional condoms. Some embodiments ofthe invention include a condom within a condom, having an inner pouchlocated within an outer pouch to create a double-walled condom withunique attributes. The inner pouch of the double-walled condom includesa narrow segment that exerts a circumferential constrictive pressureimmediately below and around the glans penis, which helps extend theamount of time during intercourse before the male reaches ejaculation,and which also prevents the inner condom from sliding relative to theshaft of the penis during intercourse. Further, the outer pouch is sizedto be large enough so that the outer film of the outer pouch slides backand forth over the inner pouch to create extra pleasurable sensationsduring intercourse. The combination of the pressure generated by theinner pouch on the penis and the sliding of the outer pouch on the innerpouch causes a delay in ejaculation combined with increased pleasure.Further, the outer film of the outer pouch sliding over the inner filmof the inner pouch, with a lubricant located between the two films,transmits pleasurable sensations to the glans of the penis. The extendedpleasure created by the outer film of the condom neutralizes thesqueezing pressure effect created by the narrow segment portion of theinner pouch. The pleasurable sensation caused by the outer film enhancesneurotransmission of ejaculation signals from the glans penis to thebrain, while the narrow portion of the inner pouch helps inhibitpremature ejaculation. In other words, the dimensions of the condom ofthe invention can be designed to enhance pleasure and/or extend the timeof intercourse, while particular dimensions of the condom may be variedto increase or reduce one of these attributes with respect to the otherattribute. Embodiments of the invention also include a guide thatensures that a condom is not put on inside out. Embodiments of theinvention also include a condom with multiple undulations or deviationsin the condom body, so that the condom body twists relative to acenterline extending from the opening, such as right and out, and thenleft and in. Embodiments of the invention also incorporate an enlargedbellows mechanism along a distal end portion of the tubular body of thecondom for enabling easy forward and backward movement to provideadditional pleasure to both partners.

FIGS. 1A-1E illustrate an exemplary embodiment of a condom 100 accordingto the invention. Condom 100 has a proximal open end 102 and a distalclosed end 104, and includes an elongated hollow inner first pouch 110disposed within an elongated hollow outer second pouch 120. Inner pouch110 and outer pouch 120 are also illustrated in FIGS. 2 and 3,respectively. Inner pouch 110 includes a first open end 111 and a firstclosed end 112, with a first tubular body 113 extending distally fromfirst open end 111 toward first closed end 112. Outer pouch 120 includesa second open end 121 and a second closed end 122, with a second tubularbody 123 extending distally from second open end 121 toward secondclosed end 122.

First tubular body 113 of inner pouch 110 has a first large diametersegment 118 that extends distally to a first transition segment 119 thatreduces in diameter to a narrow segment 109. First large diametersegment 118 has a diameter D1 at first open end 111 of pouch 110, whichis generally the same as the diameter of outer pouch 120 at second openend 121. The diameter of first tubular body 113 is reduced distally offirst open end 111 and may include a transition segment 119 where thediameter reduces to a diameter D2 at a proximal periphery 117 of narrowsegment 109. Narrow segment 109 may be a constant diameter from proximalperiphery 117 to a first neck portion 114 having a diameter D3. However,in other embodiments, diameter D3 may be slightly less than diameter D2.Distally of first neck portion 114, the diameter of inner pouch 110increases to create a bulbous first head portion 115 having a diameterD4, which is approximately equal to or less than diameter D1 of firstopen end 111. First head portion 115 reaches a maximum diameter D4 andthen decreases in diameter distally toward closed end 112, which mayinclude a reservoir type tip 116.

Second tubular body 123 of outer pouch 120 may be generally cylindrical,having a diameter D5 along the length of second tubular body 123 that isapproximately the same as diameter D1 of open end 111 of inner pouch110, and that remains approximately constant from open end 121 untilreaching a second neck portion 124, which is located generally adjacentto first neck portion 114 of inner pouch 110 when inner pouch 110 isdisposed within outer pouch 120. Distally of second neck portion 124,the diameter of outer pouch 120 increases to create a bulbous secondhead portion 125 having a diameter D6 that is greater than diameter D4of first head portion 115 of inner pouch 110. Second head portion 125increases in diameter distally of second neck portion 124, reaches amaximum diameter D6, and then decreases in diameter distally to createclosed end 122, which may include a reservoir type tip 126.

Typical condoms range between 160 to 180 mm or more in length. In theembodiment illustrated in FIGS. 1-3, outer pouch 120 is 180±10 mm inlength and inner pouch 110 is about the same length as outer pouch 120following assembly of inner pouch 110 with outer pouch 120. However, insome embodiments, inner pouch 110 may be molded to be 10-30 mm longerthan outer pouch 120. Then, during assembly, the extra length of innerpouch 110 can be folded back over open end 121 of outer pouch 120 toform a reinforcement at sealed area 105. Additionally, in the embodimentillustrated, the first large diameter segment 118 is about one third thelength of inner pouch 110, the narrow segment 109 is about one third thelength of inner pouch 110, and first head portion 115 is about one thirdthe length of inner pouch 110. Thus, in a preferred embodiment, narrowsegment is 40±20 mm in length. This distributes the pressure created bythe narrow segment and prevents uncomfortable circumferential pressurefrom concentrating on a small area of the users' penis. However, theserelative segment lengths may vary substantially in other embodiments ofthe condom 100. For example, first large diameter segment 118 may bebetween 10 and 100 mm in length, while narrow segment 109 may also bebetween 10 and 100 mm. The length of first head portion 115 is lessflexible and preferably about 30-60 mm, since the length of head portion115 aids in properly positioning narrow segment 109 below the glans ofthe penis, as is discussed further below.

As illustrated in FIGS. 1A and 1E, the diameter D6 of second headportion 125 is substantially larger than the diameter D4 of first headportion 115. For example, first head portion 115 may be of a diameter D4to fit rather snuggly on the average erect human penis, while secondhead portion 125 may be of a diameter to be quite loose on the averageerect penis, so that second head portion 125 of outer pouch 120 canfreely slide back and forth relative to first head portion 115 of innerpouch 110 and the glans of the penis. In preferred embodiments,diameters D2 and D3 may be 26±4 mm; diameter D1 of first open end 111,diameter D4 of first head portion 115 of inner pouch 110, and diameterD5 of outer tubular body 123 may be 32±4 mm; and the diameter D6 ofouter pouch 120 may be 42±6 mm. Thus, in some embodiments, the diametersD1, D4 and D5 are about 75 percent of the diameter D6. Also, in otherembodiments, the relative diameters of D1, D2, D3, D4, D5 and D6 mayvary from those set forth above. Additional significance and utility ofthe relative diameters D1-D6 of the portions of inner pouch 110 andouter pouch 120 is discussed further below.

Inner pouch 110 and outer pouch 120 are each constructed from anelastic, flexible and resilient film material, such as latex,polyurethane, or the like. Techniques for manufacturing inner pouch 110and outer pouch 120 include dip molding, whereby forms having thedesired configuration for each of the inner pouch 110 and the outerpouch 120 are dipped into a tank of the elastic material in liquidstate, so that uniform films are produced over the forms. The films setand are then removed from the forms to serve as the inner pouch andouter pouch. Inner pouch 110 and outer pouch 120 are sealed to eachother at a sealed area 105 located at, and optionally extending distallyadjacent to, open end 102 of condom 100, using an adhesive, heat seal,ultrasonic weld, or the like. Sealed area 105 may be confined to aring-shaped bead 106 located at open end 102, or sealed area 105 mayextend distally from open end 102 along the length of tubular bodies113, 123, as illustrated in FIG. 1A, thereby encompassing part oftubular bodies 113, 123. For example, in some embodiments, sealed area105 may extend from 10-100 mm distally from open end 102.

Condom 100 and pouches 110, 120 are illustrated in FIGS. 1-3 in anas-molded configuration for purposes of illustration and discussion ofvarious relative dimensions. However, during assembly of condom 100,when inner pouch 110 is placed within outer pouch 120, and prior tocompleting sealing of sealed area 105, negative pressure is createdbetween inner pouch 110 and outer pouch 120 to remove any air pockets.Further, a lubricant 103, optionally including a silicon lubricant,spermicidal, antiseptic, antibacterial, and/or antiviral agent, isdisposed in the interstitial area 106 between the inner pouch 110 andouter pouch 120 to enable smooth gliding of outer pouch 120 over innerpouch 110. For example, one cc of liquid lubricant may be used in theinterstitial area 106 for each condom 100, and an additional quantity oflubricant may be added to the exterior of condom 100 to improve ease ofdonning the condom and insertion into a vagina. The negative pressurecreated between the two pouches 110, 120 causes outer pouch 120 to bunchor cling around inner pouch 110 in a collapsed configuration therebymaximizing contact of the outer pouch with the inner pouch, and enablesthe pouches to generally function as a single unit except toward thedistal end 104, where, because of the larger relative diameters of theneck and head portions 124, 125 of outer pouch 120, the outer pouch hasa slack portion that enables the outer pouch to easily slide back andforth over the inner pouch to create pleasurable sensations. Thispleasurable effect is enhanced because the narrow segment 109 causes theinner the pouch to be locked over the penis during intercourse, or, inother words, the constriction of the narrow segment prevents the innerpouch from sliding relative to the shaft of the user's penis duringintercourse, while the outer pouch is able to slide relative to both thepenis and the inner pouch.

Conventional condoms typically have a wall thickness of 0.06-0.08 mm,while the so called “ultra sensitive” condoms have wall thicknessesbetween 0.04 and 0.05 mm. In embodiments of the present invention, innerpouch 110 is preferably constructed having a wall thickness T1 that isthinner than a wall thickness T2 of outer pouch 120. In someembodiments, inner pouch 110 has a wall thickness T1 of 0.06 mm or lessand outer pouch 120 has a wall thickness T2 of 0.08 mm or more. Undersuch a configuration, the inner pouch is thin, thereby providing maximumsensitivity to the user, while the outer pouch is as thick, or thicker,than a conventional condom, thereby providing additional protectionagainst breakage, since the outer pouch is able to withstand a largeamount of stress. The sliding action of the outer pouch 120 against theinner pouch 110 increases pleasure to the user because inner pouch 110is thin, providing high sensitivity, while the presence of the lubricant103 and the relatively larger diameters of the neck and head portions124, 125 of the outer pouch enable outer pouch 120 to slide back andforth over the inner pouch 110 which is maintained relatively immobileon the penis during intercourse due to the gripping action of narrowsegment 109. In other higher strength embodiments, inner pouch 110 has awall thickness T1 that is less than 0.10 mm and outer pouch 120 has awall thickness that is thicker than inner pouch 110 and that is lessthan 0.20 mm. Further, because each of inner pouch 110 and outer pouch120 serve as redundant protection against breakage or pinholes in theother pouch 110, 120, should one of the inner or outer pouches fail, theother of the pouches still functions to prevent pregnancy andtransmission of STDs.

Additionally, studies in the US have shown that the circumference of theerect penis of the majority of adult human males is between 3.9 and 5inches (99-127 mm), which equals an average diameter between 1.24 and1.59 inches (31-40 mm). The inner pouch 110 of the invention includesnarrow segment 113 which terminates in first neck portion 114 that isintended to be positioned just behind (i.e., below and adjacent to) theglans of the user's penis when the condom 100 is put on. In embodimentsof the invention, the diameter D2 of narrow segment 113 and first neckportion 114 is substantially less than the diameter of the average erectadult penis so as to apply a pressure to the area below the glans of thepenis and adjacent to the penile frenulum. In some preferredembodiments, the diameter D2 of the first neck portion 114 of innerpouch 110 is 26±4 mm, and preferably about 24 mm. The inventor has foundthat the narrow segment 113 of inner pouch 110 of condom 100 of theinvention applies a circumferential squeezing pressure on the penis justbelow the glans of the penis, in the vicinity of the penile frenulum,which is able to produce results similar to the so called “squeezetechnique” for preventing premature ejaculation developed by theAmerican sex therapists Masters and Johnson. (See, e.g., Masters W H,Johnson V E., Human Sexual Inadequacy, Boston: Little, Brown & Co.,1970, which is incorporated herein by reference.) Thus, the condom 100of the invention is able to increase the length of time of sexualintercourse by inhibiting premature ejaculation due to the narrowsegment overlying and applying pressure to the penile frenulum, whilethe sliding action of the outer pouch 120 over the thinner inner pouch110 creates a uniquely pleasurable sensation for both users.

Further, first head portion 115 of inner pouch 110 has a diameter D4that may be sized larger or smaller to increase or decrease the amountof pleasure experienced by the wearer of the condom, while the diameterof narrow segment 109 can also be adjusted to control the degree ofsqueezing effected. For example, first head portion 115 may have adiameter D4 of 28 mm that will fit tightly on the average human penis,while narrow segment 109 may have a diameter D3 of 24 mm or less. Thisconfiguration will create an inner pouch that fits tightly on theaverage human penis and that applies a circumferential squeezingpressure in the area of the penile frenulum and glans that has aninhibiting effect on premature ejaculation, but also results in slightlyreduced pleasure for the user. On the other hand, as another example,when first head portion has a diameter D4 of 36 mm and narrow segment109 has a diameter D3 of 24-28 mm, the pleasure experienced by the useris greater because first head portion 115 is able to slide relative tothe glans of the penis, while the remainder of the inner pouch 110 isheld immobile due to the circumferential pressure applied by narrowsegment 109. Further, the circumferential pressure applied by narrowsegment 109 in the area below the glans penis at the location of thepenile frenulum is still able to have an inhibiting effect on prematureejaculation. Accordingly, it may be seen that the dimensions of theinner pouch may be tailored to achieve varying effects in increasing ordecreasing pleasure and in inhibiting premature ejaculation.

Additionally, in alternative embodiments, the inner pouch 110 may beused independently of the outer pouch 120 as a standalone condom, but insuch cases, a number of advantages of condom 100 will be lost, includingthe additional protection against breakage provided by the outer pouch,and the added sensation due to the sliding action of the outer pouch 120over the inner pouch and glans of the penis. Furthermore, the sizes anddimensions given above are intended to accommodate the range of theaverage human penis, as discussed above. It will be apparent that therelative dimensions of the condom 100 of the invention may be adjustedto create a larger or smaller overall condom able to produce the samebeneficial attributes to enable the condom to fit properly, asdescribed, on men having larger or smaller penises than average,respectively.

Guide

FIGS. 4A-4B and 5A-5B illustrate a condom guide 200 that serves as anaid in preventing condom 100 or any other condom from being appliedinside out. Because the condom 100 of the invention includes an innerpouch 110 and an outer pouch 120 that are distinct in structure, purposeand function, it is important that condom 100 not be applied inside out.However, condom 100 is rolled like a conventional condom for use, and sothere is a risk that condom 100 might be put on incorrectly by a user.In order to reduce this risk a guide 200 may be provided and packagedwith condom 100 to aid in proper application of condom 100.

In a preferred embodiment, guide 200 includes a cylindrical body 202having an upper first end 204 and a lower second end 206. A pair ofopposed restrictors 208 extend outwardly in a wing-like mannerperpendicularly from cylindrical body 202 at first end 204 and serve toprevent a rolled condom 210 from being unrolled from guide 200 in theincorrect direction. An annular lip 212 is included at lower second end206 to help retain rolled condom 210 on guide 200 until a user is readyto put on condom 210. The guide 200 is sized so that condom 210, in therolled configuration, as illustrated in FIGS. 5A and 5B, will fitsnuggly around cylindrical body 202, and be retained on cylindrical body202 by annular lip 212. A pair of opposed arc-shaped cut outs 213 may beincluded in cylindrical body 202 to make it easier for a user to graspand pinch the tip 214 of condom 210 while unrolling condom 210 onto apenis. Guide 200 may be constructed from plastic, such as from moldedthermoplastic polymer, or other suitable material.

In use, condom 210 is preferably prepackaged and premounted on guide200. The user places guide 200 with rolled condom 210 mounted thereon onthe end of the penis so that lower second end 206 of guide 200 isclosest to the penis. The user then unrolls the condom onto the penis inthe direction of arrows 216, while simultaneously pinching the tip 214of condom 210 to remove any air from the tip. Once the condom has beenunrolled off the guide 200, guide 200 may be discarded. If a user shouldattempt to unroll condom 210 onto the penis in the incorrect direction(i.e., opposite to arrows 216), it may be seen that restrictors 208 willprevent the condom from being unrolled in this direction. Further,should the user force the condom over restrictors 208, the guide will betrapped between the condom and the user's penis which will alert theuser that that condom 210 is being applied incorrectly. Additionally, asmentioned above, while guide 200 is particularly useful for use withcondom 100 of the invention, guide 200 may be used with any rolledcondom for ensuring proper application, and is not limited to use withcondom 100 described above.

Condom having an Undulated Body

FIGS. 6A-6B illustrate another embodiment of a condom 300 having anundulated body configuration. Condom 300 consists of a hollow tubularbody 310 having a proximal open end 311 and a distal closed end 312,with a distal tip 314. Tubular body 310 is undulated or in deviationfrom the center line 302, such that if centerline 302 forms an x axis inan xyz frame of reference, then in FIG. 6A, the z axis 316 is coming outof the page, and in FIG. 6B, the y axis 318 is coming out of the page.Thus, it may be seen that tubular body 310 undulates in multipledirections along its length. In the example illustrated, a first segment320 is substantially parallel with centerline 302. A second segment 322turns upward in the y direction a distance of d1, such that the distanced1 may be measured to the centerline 302 as the radius r of tubular body310 at open end 311 plus distance d1. Additionally, second segment 322also extends outward in the z direction a distance of r+d2 from thecenterline 302. In the embodiment shown d1=d2, but this is notnecessarily the case in other embodiments. A third segment 324 extendsback in the minus y direction a distance of r+d3, while extending backin the minus z direction a distance of r+d4 from the centerline 302. Inthe embodiment shown d3=d4, but this is not necessarily the case inother embodiments. A fourth segment extends in the positive y andpositive z directions again to return tip 208 to centerline 302. Condom300 may be lubricated and rolled like a regular condom for easyapplication. The unique shape of condom 300 provides a pleasurablesensation to the user by creating areas of slack along the length of thecondom, while other areas are stretched more tightly to maintain thecondom in position.

Bellows Head Condoms

FIGS. 7 and 8 illustrate two exemplary embodiments of condoms having abellows formed toward the closed end. As illustrated in FIG. 7, a condom400 includes a pouch 403 having a proximal open end 402 and a distalclosed end 404. Closed end 404 is a round flat slightly domed end,rather than having a conventional reservoir tip. Pouch 403 includes atubular body portion 410 and an expanded bellows configuration 408formed distally toward the closed end 404 of tubular body 410. Bellowsconfiguration 408 is formed by a spiral shaped channel or bulge 412 thatextends radially outward from tubular body 410 and that extends alongthe remaining length of pouch 403 in a spiral configuration. Spiralshaped bulge 412 is formed on condom 400, so that when condom 400 isplaced on a user's penis, the bellows configuration 408 is positioned soas to begin below the glans of the penis. Bulge 412 is sufficientlylarger in diameter than tubular body 410 that so that the bellowsconfiguration 408 fits loosely on the end of the user's penis and isable to move freely back and forth, while tubular body 410 fitssufficiently snuggly around the shaft of the user's penis to preventslippage of the condom from the base of the penis. For example, in someembodiments, tubular body 410 may be 34 mm in diameter, while bulge 412forming bellows 408 the closed end 404 may be 51-55 mm in diameter.During use, the bellows configuration 408 moves back and forth (i.e.,expands and contracts) with each thrust made during intercourse, therebyproviding additional pleasurable stimulation to both partners.

FIG. 8 illustrates a condom 401, similar to condom 400 described above,and having a bellows configuration 418 formed toward the distal end 404thereof. Condom 401 includes two spiral shaped bulges 412, and functionsin a manner similar to condom 400 described above. Bellows configuration418 may be of a diameter similar to bellows configuration 408 of condom400, and thus, in some embodiments, tubular body 410 may be 34 mm indiameter, while bulges 412 forming bellows 418 and closed end 404 may befrom 51-55 mm in diameter. Further either of condoms 400, 401 may beused as the outer pouch 120 in the embodiment of FIGS. 1A-1E, therebyproviding even greater sliding sensation caused by outer pouch 120.

Thus, it may be seen that the inventive condoms described above provideimproved and extended pleasure to the users, and also can decrease thelikelihood of failure. Further, while specific embodiments have beenillustrated and described in this specification, those of ordinary skillin the art appreciate that any arrangement that is calculated to achievethe same purpose may be substituted for the specific embodimentsdisclosed. This disclosure is intended to cover any and all adaptationsor variations of the present invention, and it is to be understood thatthe above description has been made in an illustrative fashion, and nota restrictive one. Accordingly, the scope of the invention shouldproperly be determined with reference to the appended claims, along withthe full range of equivalents to which such claims are entitled.

1. A condom comprising: a first pouch having a first open end and afirst closed end, said first pouch being disposed within a second pouch,said second pouch having a second open end and a second closed end; saidfirst pouch being bonded to said second pouch adjacent to said first andsecond open ends to form a sealed interstitial space between the firstand second pouches; a lubricant being located in said interstitial spaceto enable said second pouch to slide relative to said first pouch; saidfirst pouch having a first wall thickness that is less than a secondwall thickness of the second pouch; and said first pouch having a narrowsegment that is less than an average diameter of an erect human penis,said narrow segment applying circumferential pressure to an area belowthe glans of the penis when the condom is disposed on the penis.
 2. Thecondom according to claim 1, wherein said first wall thickness is 0.10mm or less and said second wall thickness is 0.20 mm or less and thickerthan said first wall thickness.
 3. The condom according to claim 1,wherein said first wall thickness is 0.06 mm or less and said secondwall thickness is 0.08 mm or more.
 4. The condom according to claim 1,further comprising: said first pouch having a first tubular body, saidfirst tubular body having a first diameter segment having a firstdiameter at said first open end, said first tubular body transitioningdistally of said first opening to a second diameter at a proximalperiphery of a narrow segment, said narrow segment extending distally toa first neck portion of said first pouch, said first neck portion havinga third diameter, said narrow segment being between 10 and 100 mm inlength, said first tubular body transitioning to a fourth diameterdistally of said first neck portion at a first head portion of saidfirst pouch and then transitioning to said first closed end.
 5. Thecondom according to claim 4, wherein said second diameter and said thirddiameter are less than said first diameter and said fourth diameter, theportion of said first tubular body extending between said seconddiameter and said third diameter comprising said narrow segment, andbeing less than an average diameter of an erect human penis, wherein,when said condom is disposed on the penis, said first neck portion islocated immediately below the glans of the penis and said narrow segmentapplies said circumferential pressure.
 6. The condom according to claim5, wherein said second pouch has a second tubular body, said secondtubular body having a second neck portion located in the vicinity ofsaid first neck portion when said first pouch is disposed within saidsecond pouch, said second neck portion having a fifth diameter that isgreater than said third diameter of said first neck portion, said secondneck portion transitioning to a sixth diameter distally of said secondneck portion at a second head portion and then transitioning to saidsecond closed end, wherein said fourth diameter at said first headportion is 76 percent or less than the sixth diameter at said secondhead portion so that said second pouch is able to easily slide back andforth relative to said first pouch at said second head portion due toback and forth movement of the penis and the condom during intercourse.7. The condom according to claim 6, wherein said sixth diameter is 42 mmor more and said fourth diameter is 32 mm or less.
 8. The condomaccording to claim 1, wherein said first pouch is bonded to said secondpouch at a bonded area adjacent to said first and second open ends, saidbonded area extending distally of said first and second open endsbetween 10 and 100 mm.
 9. The condom according to claim 1, wherein theinterstitial space between said first pouch and said second pouch isunder negative pressure so that said second pouch clings around saidfirst pouch in a collapsed configuration.
 10. A condom comprising: afirst pouch having a first open end and a first closed end, said firstpouch being disposed within a second pouch, said second pouch having asecond open end and a second closed end, said first pouch being bondedto said second pouch adjacent to said first and second open ends to forma sealed interstitial space between the first and second pouches; alubricant located in said interstitial space to enable said second pouchto slide relative to said first pouch; said first pouch having a firsttubular body, said first tubular body having a first diameter segmenthaving a first diameter at said first open end, said first tubular bodytransitioning distally of said first opening to a second diameter at aproximal periphery of a narrow segment, said narrow segment extendingdistally to a first neck portion of said first pouch, said first neckportion having a third diameter, said narrow segment being between 10and 100 mm in length, said first tubular body transitioning to a fourthdiameter distally of said first neck portion at a first head portion ofsaid first pouch and then transitioning to said first closed end,wherein said second diameter and said third diameter are less than saidfirst diameter and said fourth diameter, the portion of said firsttubular body extending between said second diameter and said thirddiameter comprising said narrow segment, and being less than an averagediameter of an erect human penis, wherein, when said condom is disposedon the penis, said first neck portion is located below the glans of thepenis and said narrow segment applies circumferential pressure to thevicinity of the penile frenulum.
 11. The condom according to claim 10,said first pouch having a first wall thickness that is less than asecond wall thickness of the second pouch;
 12. The condom according toclaim 11, wherein said first pouch has a wall thickness of 0.06 mm orless and said second pouch has a wall thickness of 0.08 mm or more. 13.The condom according to claim 11, wherein said first wall thickness is0.10 mm or less and said second wall thickness is 0.20 mm or less andthicker than said first wall thickness.
 14. The condom according toclaim 10, wherein said first diameter is 32±4 mm, and wherein saidsecond diameter and said third diameter are 8±4 mm less than said firstdiameter.
 15. The condom according to claim 10, further comprising: saidsecond pouch having a second tubular body, said second tubular bodyhaving a second neck portion located in the vicinity of said first neckportion when said first pouch is disposed within said second pouch, saidsecond neck portion having a fifth diameter that is greater than saidthird diameter of said first neck portion, said second neck portiontransitioning to a sixth diameter distally of said second neck portionat a second head portion and then transitioning to said second closedend, wherein said fourth diameter at said first head portion is 76percent or less than the sixth diameter at said second head portion sothat said second pouch is able to easily slide back and forth relativeto said first pouch at said second head portion during intercourse. 16.The condom according to claim 10, wherein said first pouch is bonded tosaid second pouch at a bonded area adjacent to said first and secondopen ends, said bonded area extending distally of said first and secondopen ends between 10 and 100 mm, and wherein the interstitial spacebetween said first pouch and said second pouch is under negativepressure so that said second pouch clings around said first pouch in acollapsed configuration.
 17. A condom comprising: a first pouch having afirst open end and a first closed end, said first pouch being disposedwithin a second pouch, said second pouch having a second open end and asecond closed end, said first pouch being bonded to said second pouchadjacent to said first and second open ends to form a sealedinterstitial space between the first and second pouches; a lubricantlocated in said interstitial space to enable said second pouch to sliderelative to said first pouch; said first pouch having a first wallthickness that is less than a second wall thickness of the second pouch;said first pouch having a first tubular body, said first tubular bodyhaving a first diameter segment having a first diameter at said firstopen end, said first tubular body transitioning distally of said firstopening to a second diameter at a proximal periphery of a narrowsegment, said narrow segment extending distally to a first neck portionof said first pouch, said first neck portion having a third diameter,said narrow segment being between 10 and 100 mm in length, said firsttubular body transitioning to a fourth diameter distally of said firstneck portion at a first head portion of said first pouch and thentransitioning to said first closed end, wherein said second diameter andsaid third diameter are less than said first diameter and said fourthdiameter, said third diameter being less than an average diameter of anerect human penis, wherein, when said condom is disposed on the penis,said first neck portion is located below the glans of the penis, andsaid first neck portion applies circumferential pressure to the vicinityof the penile frenulum; and said second pouch having a second tubularbody said second tubular body having a second neck portion located inthe vicinity of said first neck portion when said first pouch isdisposed within said second pouch, said second neck portion having afifth diameter that is greater than said third diameter of said firstneck portion, said second neck portion transitioning to a sixth diameterdistally of said second neck portion at a second head portion and thentransitioning to said second closed end, wherein said fourth diameter atsaid first head portion is 76 percent or less than the sixth diameter atsaid second head portion so that said second pouch is able to easilyslide back and forth relative to said first pouch at said second headportion during intercourse, thereby providing stimulation to the glansof the penis.
 18. The condom according to claim 17, wherein said sixthdiameter is 42 mm or more and said fourth diameter is 32 mm or less. 19.The condom according to claim 17, wherein said first pouch is bonded tosaid second pouch at a bonded area adjacent to said first and secondopen ends, said bonded area extending distally of said first and secondopen ends between 10 and 100 mm, and wherein the interstitial spacebetween said first pouch and said second pouch is under negativepressure so that said second pouch clings around said first pouch in acollapsed configuration.
 20. The condom according to claim 17, whereinsaid first wall thickness is 0.10 mm or less and said second wallthickness is 0.20 mm or less and thicker than said first wall thickness.